2　Terms

2.0.1　Rail tank car

A special enclosed railway wagon used to transport liquid，gases or powder.

2.0.2　Rail tank car cleaning facilities

A generic term for the facilities specially used for internal cleaning operation of rail tank cars，including tanker cleaning platform，pump station，hot water supply system and mechanical cleaning equipment，shortened as rail tank car cleaning station.

2.0.3　Independent rail tank car cleaning station

A type of rail tank car cleaning station designed with self-contained utilities and located away from enterprise.

2.0.4　Rail tank car cleaning station operated by enterprise

A type of rail tank car cleaning station located near to enterprise or located within the fencing of enterprise and supported by the utilities of enterprise.

2.0.5　Fixed cleaning equipment

A type of cleaning equipment installed at fixed location for cleaning rail tank cars.

2.0.6　Mobile cleaning equipment

A type of cleaning equipment installed on mobile power car for cleaning rail tank cars.

2.0.7　Cleaning for change-over

A type of cleaning operation performed in rail tank car in case when the category of oil product for transportation is to be changed or cleaning is required to satisfy the oil product storage requirements.

2.0.8　Cleaning for maintenance

A type of cleaning operation carried out in rail tank car before maintenance is performed on tanker.

2.0.9　Mechanical cleaning

A type of cleaning process where mechanical equipment is used to remove oil contaminants from tanker.

2.0.10　Manual cleaning

A type of cleaning process where manual cleaning is used to remove oil contaminants from tanker.

2.0.11　General cleaning

A type of cleaning operation to ensure the interior wall of cleaned tanker is free of oil，water（or ice），mud and sand，wood debris，rust scales and rust sediments through visual examination.

2.0.12　Special cleaning

A type of cleaning operation to ensure the interior wall of cleaned tanker is free of water（or ice），mud and sand，wood debris，oil stains，fiber yarns and visible rust scales through visual examination，is free of oil odor through nasal smelling，and is free of rust scales，rust sediments and black contaminants through rag wiping and the interior walls present light yellow color.

2.0.13　Recycle cleaning water

Water recycled for cleaning operation after treatment.

2.0.14　Cleaning facilities room

A fenced building where cleaning facilities are installed in group.

2.0.15　Cleaning facilities shed

A semi-fenced or fenceless building where cleaning facilities are group arranged.